Heat dissipating L.E.D. traffic light
US5782555A · kind A · utility
Inventor
Key dates
| Filing date | Jun 27, 1996 |
| Grant date | Jul 21, 1998 |
| Priority date | — |
| Expiry date | Jun 27, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S362/80
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electrically driven L.E.D. lamp assembly (14) comprising an electrically insulating circuit board (26) having opposed first and second surfaces with light emitting diodes (28) having positive and negative leads (30, 32) mounted on the first surface and an electrically conductive plating on the first surface for establishing discrete and electrically conductive paths (34) for electrically interconnecting the positive lead (30) of one the light emitting diodes to the negative lead (32) of another of the light emitting diodes. A plurality of holes extend through the board (26) and a plurality of pads (50) of thermally conductive plating are disposed on the second side with each pad (50) associated with one of the holes and a thermally conductive material extending through the holes and thermally connecting each of the pads (50) and one of the leads to conduct heat from each of the leads to one of the pads (50) while maintaining electrical isolation between the pads. The pads (50) are rectangular in area configuration and are separated by a grid of crossing lines (54) of separation, the lines (54) being in transverse groups with all the lines (54) in one group being parallel and at …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.